Water pump



Jan. 13, 1953 c. H. EISENHUTH WATER PUMP 2 SHEETSSHEET 1 Filed Nov. 19, 1948 EjwuQ W Carl H. Ea'senhuth Jan. 13, 1953 c. H. EISENi-IUTH WATER PUMP 2 SHEETS-SHEET 2 Filed Nv. 19, 1948 Carl H. Ez senhuZ-h Patented Jan. 13, 1953 UNITED STATES PATENT OFFICE WATER PUMP Carl H. Eisenhuth, Thermal, Calif. Application November 19, 1948; Serial No. 60,981

This invention relates to evaporative air coolers and more particularly a water pump therefor. a

The primary object of this invention resides in the provision of a water pump for evaporative air coolers-adapted to'minimize the use of water therefor by continuously circulating it between the air cooling unit thereof and sump or reservoir for the same.

Another object of this invention resides in the combination of an evaporative air cooler and means for returning used water to the air cooling unit thereof.

A further object of this invention resides in the particular construction of the water pump.

A still further object of this invention resides in the provision of a water pump adapted to operate at slow speed and also lubricate the bearings of its drive shaft. i

With these and other objects in view, this invention resides in certain novel features of construction and, arrangement of elements to be hereinafter, more particularly set forth in the specification, illustrated in the accompanying drawings and pointed out in the appended claim and, although this disclosure depicts my present conception of the invention, the right is reserved to resort to such departures therefrom as come within the scope of the claim.

In the accompanying drawings forming a part of this application;

Fig. 1 is a side view of the water pump as assembled with the air blower and water reservoir of an evaporative air cooler.

Fig. 2 is an enlarged vertical sectional view through the pump.

' Fig. 3 is a horizontal sectional view through the pump taken approximately on line 33 of Fig. 1.

Fig. 4 is' a modified form of the pump. Fig. 5 is a vertical sectionalview through another modified. form of the pump.

Fig. 6 is a horizontal sectional view taken approximately on line 6-6 of Fig. 5.

Fig. 7 is a perspective view of the lower portion of the water discharge pipe. Fig; 8 is a perspective view of the rubber roller.

Fig.9 is an enlarged vertical sectional view a modified form of upper bearing.

In the present illustration of this invention the numeral 5 designates an evaporative cooler which, among other well known elements, consists of an air blower 6 and a water reservoir 1 preferably but not necessarily supplied with waterdischarged from the air cooling unit or screens of the air cooler.

Submerged in the aforesaid water reservoir 1 and forming the subject matter of this invention is a water pump designatedingeneral, .by the numeral 8 and consists of a casing 9 having an 1 Claim. 01. foa 132) iii) elongated tubular water duct l0 extended through the top thereof and provided with upper and lower bearings l2 and I2 through which rotatably extends a drive shaft l3 having a water impeller l4 secured to its lower end for rotation within said casing and a bearing collar M at its upper portion rotatably seated on the bearing 12. Said tubular duct I0 is of greater diameter than the drive shaft l3 and is provided witna water inlet l5 communicating with the interior of the casing above the impeller and lower bearing 12 and. with adrain tube It above the upper bearing I2. v

The impeller [4 consists of an inverted dish shaped head ll having a plurality of arcuate or otherwise formed blades l8 formed on its lower side and a threaded boss l9rformed on its upper side to accommodate the lower threaded end of the aforesaid drive shaft for rotating the same.

Secured to the lower edges of the blades I8 is a dish shaped cover plate 20 having a centrally disposed collar 2| formed'thereon which rotatably surrounds a smaller collar 22 formed on a bottom cap plate 23 secured to the lower open end of the casing. Said collar 22 directs the bypass high pressure water so it will flow in the same direction as the incoming water, the clearance being the only location where the high pressure water can bypass to the suction side of the pump.

- .Formed in the side of the casing opposite the impeller is a water outlet port 24 to which a water discharge pipe 25 is connected for conveying water'from the aforesaid water reservoir Torother elected source thereof which is forced to the air filtering or cooling units of the air cooler, it being within the purview of this invention to provide the casing with any desired number of water outlet pipes.

In'practicing this invention with the aforesaid assemblage of elements, the casing is disposed in the water reservoir'with the water inlet collar 2| submerged beneath the surface of .the water therein to maintain a constant supply of water to the pump while the shaft of the ime peller is. disposed within the air duct 5 and provided with a fan -like blade 26 for rotation by an impeller type fan 6' within the blower, however, it is to beunderstood other well known power transmitting mean s ,,such as an electric motor or the like, maybe employed to rotate the shaft of (V the impeller 'withincorexteriorly of the air duct 5'. During rotation of the water impeller a limited volumeof water is forced through opening .15 into the water duct H) from which it is worked through the upper bearing l2 by the shaft I3 and drainedfrom above the bearing through drain tube l6- Y -In;that form of the invention shown in Fig. 4 of the drawings, the bottom of the casing is closed and a compartment B is formed therein below a plurality of water inlet openings C in its top and side for reception of an impeller D having a collar E surrounding a smaller collar E formed on the lower side of the upper wall of the compartment to form communication between the inner spaced ends of blades F thereof and upper perforated portion of the casing.

Secured to the center of the impeller and extending through the bearings of the tubular water duct I9 is a drive shaft G having a water inlet passage H at its lower end forming communication between the lower portion of the casin and that portion of said tubular water duct above the lower rubber bearings l2 therein to permit water to be raised from the bottom of the casing and fed to the bearings as a lubricant. Said casing and tubular water duct are otherwise similar to that disclosed in Figs ,1, 2

and 3 of the drawings and the drive shaft G is likewise operated by any well known power transmitting 'rneans.

Referring to the modified form of the invention illustrated in Figs. 5 and 6 of the drawings, the numeral designates a. cylindrical casing provided with a removable bottom 3|, diverging inlet and outlet ports 32 and 33 formed in a lug on the outer periphery of the casing and a centrally disposed cylindrical collar 34 on its upper surface having a bore 35 therein to rigidly conelongated cam having an annular groove 4! in its periphery communicating with a water passage 42 in a rubber roller 43 mounted on said shaft with a portion of its periphery always contacting the cylindrical bore of the casing so as to squeeze incoming water between a rubber partition fin 44 formed thereon and thereby force it to the air cooling and filtering unit of the air cooler. Said rubber roller has substantially dish shaped top and bottom sides to reduce friction between the same and opposed walls of the casing and also provide water pockets 45 and 46 the latter of which communicates with the passage 39 by a port 41 in the shaft. The aforesaid partition fin 44 is integral with the periphery of the rubber roller and has a substantially cylindrical head 41 slidably seated in a guide slot 48 formed in a lug 49 on the outer side of the casing between the water inlet and hutlet ports thereof. During rotation of the roller in the casing pressure against the water on the outlet side of the fin 44 forces a certain volume of the water through passage 42 into the annular groove 4| in the cam from which it seeps 'or flows between the periphery of the cam and bore in the roller into the water pockets 45 and 46 whereupon constant pressure on the water entering the aforesaid groove causes it to enter passage 39 in the drive shaft through that end thereof communicating with the pocket 45 and a port 41 communicating with the upper pocket 46 and said passage 39. With the water under constant pressure in the aforesaid pockets it is driven through the passage 39-into the tube 36 at a point above the 4 lower bearing therein until the tube becomes filled with water whereupon it will be driven through the shaft receiving bores of the bearings with that volume thereof forced above the upper bearing '37 flowing therefrom through drain tube [6.

Although this invention is successfully practiced with these forms of impellers set forth, it is to be understood other designs of the same may be substituted therefor just so like functions of the combination of elements can be performed.

With this invention fully set forth, it is manifest that means are provided whereby stored water is continuously circulated between a reservoir and the air cooling unit of air coolers and, through the particular method of lubricating the bearings of the drive shaft, friction and wear thereof is materially reduced.

Having thus described my invention, what 1 claim and desire to protect by Letters Patent is:

water pump for air coolers comprising a casing including an upper wall having a cylindrical bore disposed vertically therein and a lower wall covering the casing therein, a radially slotted lug formed on the outer periphery of the casing and having adjacent inlet and outlet water passages formed therein on opposite sides of said radial slot therein and communicating with the bore of the casing, a cylindrical collar centrally formed on the upper wall of the casing, an elongated tubular duct having its lower end secured in said cylindrical collar, a rubber bearing secured in the lower end of said tubular duct, an upper rubber bearing secured in the tubular duct inwardly of its upper end, a rubber roller disposed in the bore of the casing with edge portions of its upper and lower surfaces bearing against said upper and lower walls of the casing and having depressed areas inward of its edge portions spaced from said walls of the casing and forming water receiving pockets therebetween, an elongated cam rotatably mounted in said rollerand having an annular groove in its periphery communicating with the aforesaid pockets, a vertically disposed drive shaft fixed to the cam and extending through said rubber bearings in the tubular duct and having an axial water passage in its lower end communicating with the pockets in the roller and with the tubular duct at a point above the lower bearing therein, a rubber partition fin formed on the periphery of the roller and having a cylindrical outer end slidably seated in the aforesaid slot between said inlet and outlet water passages in the lug on the periphery of the casing and forming a water seal betweenthe water receiving and discharge areas in the casing, a water inlet passage formed in the roller and forming communication between the aforesaid groove in the cam and the .bore of the casing in the region of the fin and water outlet passage in the aforesaid lug,

and power transmitting means connected to the outer end of the shaft. 7

CARL H. EISENHUTIL.

REFERENCES orri'zo The following references are of record in the 

